Improvement in cutter-heads for molding-machines



MILTON W. CLARK.

improvement in Cutter Heads for Moulding Machines,

N0.H8,907, Patented Sep.12,1871.

UNITED STAT 'A'IENT OFFICE.

MILTON W. CLARK, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO B. BALL &(10., OF SAME PLACE.

IMPROVEMENT IN CUTTER-HEADS FOR MOLDING-MACHINES.

Specification forming part of Letters Patent No. 118,907, datedSeptember 12, 1871.

To all whom it may concern:

Be it known that I, MILTON W. CLARK, of the city and countyofINorcesterandCommonwealth of Massachusetts, have invented certain new and usefulImprovements in Upright Molding-Machines; and I do hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accomp anyin g drawin g which forms a part ofthis specification, and in which Figure 1 represents such portions of anupright molding-machine as are necessary to illustrate my invention.Fig. 2 represents a transverse horizontal section at line x :r, Fig. 1.

To enable others skilled in the art to which my invention belongs tomake and use the same, I will proceed to describe it more in detail.

This invention relates to that class of machines known as uprightmolding or shaping-machines, which are employed for cutting moldingsupon or working irregular-shaped edges or surfaces, the work beingattached to and guided by a suitable pattern. My invention consists inthe combination with the revolving spindle and cutterhead of a loosecollar or patternguide, as here inafter described.

In the drawing the part marked A represents the revolving spindle, Bindicates the cutterhead, composed of the sections 1) b. 0 indicates thecutting-knives; D, the holding-nut, by means of which the sections ofthe cutter-head are secured to the spindle A; and E indicates the lineof the top surface of the work-table. Upon the spindle A, below thecutter-head B, I arrange a collar, F, which is fitted loosely upon saidspindle, so that it can easily be revolved in either direction. Thespindle is provided with a shoulder to support the collar I and alsowith a separate shoulder to support the section I) b of the cutterheadB, as indicated by dotted lines in Fig. 1, so that the cutter-head B canbe clamped firmly in position upon the spindle A by means of the nut Dwithout interfering with the action of the collar or pattern-guide F.

In the operation of the machine, the edge of the pattern wh ereon thework is supported is run against the collar or guide F to give theproper direction to the work, and the collar, acting as a roll, turnswith the motion of the pattern, independent of the motion of thecutter-head B. By this means the friction between the pattern and thespindle A is but slight in comparison to the amount of friction producedwhere the pattern is run directly against the lower end of thecutterhead, so that the pattern can be pressed firmly against the collarto hold the work up to the cutter without retarding the motion of thespindle A, while at the same time the pattern and work can be movedforward with ease. The collar or patternguide F can be removed from thespindle when desired, and exchanged for one of greater or lesser size,to correspond with the difl'erent sizes of the cutter-heads, which maybe used; or by using two sizes of collars with the same size ofcutter-head different forms, having a proportional similarity, can becut with a single pattern. It will be noticed that, as the collar Frests upon a shoulder upon the spindle to which the head is rigidlysecured, there is no danger or liability of the pattern-guide or collarchatterin g, or giving the pattern an irregular or jarring motion. Thecutter-headB may be made in any of the well-known forms, and any desiredmechanism can be employed for adjusting and operating the spindle Awhich mechanism it is not necessary to herein illustrate and describe.

Having described my improvementsin upright molding-machines, what Iclaim therein as new and of my invention, and desire to secure byLetters Patent, is-

The combination, with the spindle A, provided with separate shouldersfor the head B and collar F, of the cutter-head B and loose collar F,said parts being constructed and arranged, in relation to each other,substantially as shown and described.

MILTON W. CLARK. Witnesses:

CHAS. H. BURLEIGH. A. E. PEIRGE.

